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JAMB Physics 2009 Question 12

Question 12

Simple Machines

If a heavy barrel is rolled up a plane inclined at 30° to the horizontal, its velocity ratio will be

  1. A.3.0.
  2. B.3.1.
  3. C.3.2.
  4. D.2.0.
Show the answer and explanation

Answer: D (2.0.)

Explanation

For an inclined plane VR = 1/sin θ = 1/sin 30° = 1/0.5 = 2.0.